How to clean and lubricate a motorcycle chain, check its tension and spot wear. When to replace the complete kit with front and rear sprockets.
A final drive that becomes noisy or has stiff links needs checking straight away and carefully. A motorcycle chain works exposed to dirt and weather and suffers in harsher climates: its maintenance changes with the conditions you ride in. To do the job properly you need compatible products and the specifications in the manual, especially when measuring the slack.
A motorcycle chain should be cleaned with a product suited to its seals and lubricated following the manufacturer’s instructions. Slack is checked under the conditions set out in the vehicle manual; wear calls for an assessment of the whole final drive. Mekainos helps you organise maintenance around the way you ride and keeps its history.
how do you clean a motorcycle chain without damaging it?
Switch off the engine and make the bike stable on a suitable support: put it on the centre stand or on the right paddock stands. The wheel must be turned by hand, keeping your fingers away from the points where the chain meets the sprockets. Remember to keep the ignition off: if the wheel spins with the ignition on, the ABS control unit can log a fault. Never turn it with the engine running and a gear engaged: the chain drags fingers into the sprockets.
Identify the type of chain before choosing the cleaner. On chains with seals, sold for example as O-ring or X-ring, the product must be compatible with the seals. They hold the internal lubricant in place: damaging them ruins the way the links work. The technical instructions for cleaning sealed chains recommend a suitable cleaner and a rag. Do not use aggressive solvents or stiff-bristled brushes, because chemical and mechanical action can permanently damage the O-rings. So avoid choosing a product just because it dissolves grease quickly.
Remove the dirt along the whole chain, moving the wheel round by hand a little at a time. Follow the cleaner’s application times and let it dry as directed. Protect the tyre and brake disc from overspray: their surfaces must stay free of lubricant.
how do you lubricate a motorcycle chain and choose the grease?
Choose a lubricant intended for the type of final drive fitted. Motorcycle chain grease is chosen first of all for its compatibility with the seals. The operating conditions stated for the product must also match the way you ride.
The same instructions recommend a short ride after cleaning, to dry off the cleaner, and applying lubricant while the chain is still warm. Apply it where the instructions say, spreading it over the accessible section while you move the wheel forward by hand. Too much lubricant attracts dirt and can be flung onto nearby parts. Allow the time needed before riding off. Even a sealed chain, with its lubricant locked inside the seals, needs lubricating on the outside. Avoid mixing products without checking they are compatible. If you have an automatic oiler, follow its specific instructions, including for periodic checks.
how often should you clean and lubricate the chain?
A chain manufacturer recommends lubricating it every other ride and cleaning and drying it every 500 km. The motorcycle manual remains the reference. Rain and washing strip the lubricant away: afterwards, it needs another coat. Check the final drive after particularly dirty routes and before a trip. If a thick deposit has built up on the surface, clean before lubricating. Lubricant spread over dirt does not reach where it is needed.
You can plan these jobs with the guide to motorcycle maintenance by use. Note down when you worked on the final drive and any anomaly that appeared. The history also helps the workshop tell whether a change is recent or recurring.
how do you check motorcycle chain tension?
People usually talk about motorcycle chain tension; the check normally concerns the slack specified by the manufacturer. The manual states where to measure it and how to position the bike. Following those conditions is essential if you want to compare the reading with the specified value. Move the wheel forward by hand and repeat the check along the chain to find the tightest section. Marked differences mean the chain’s condition needs checking. Tightening it until there is no slack left can create excessive loads when the suspension moves.
how do you adjust the slack correctly?
The procedure depends on the system fitted: some bikes have adjusters, others an eccentric mechanism. Use the sequence in the manual and the tools it specifies. On systems with side adjusters, check wheel alignment as the vehicle specifications require.
Respect the tightening torques and check the slack again once the fixings are locked, because it can change during the job. If you lack the specifications or a suitable torque wrench, leave the adjustment to a workshop. Approximate tightening can compromise the safety of the final drive.
when should you replace a motorcycle chain?
Links that stay stiff and missing seals call for attention. Significant corrosion or unusual noises can also indicate deterioration. The technical guide to maintenance and replacement lists these conditions and excessive elongation among the reasons to replace the final drive.
Have the wear assessed with the method and limit specified for the part. The same manufacturer sets maximum elongation at 1% of the length for sealed chains and 2% for non-sealed ones. Frequent adjustment can be a clue, but mileage alone cannot tell you. If there is visible damage, stop riding and arrange an inspection before setting off again.
why replace the complete kit?
A motorcycle chain kit also includes the front and rear sprockets, which work paired with the chain. Chain manufacturers advise replacing both sprockets together with the chain. Wear changes the contact surfaces: fitting a new part on worn sprockets can speed up its wear. Replacing the whole set restores a matched drive. You need a kit compatible with the motorcycle’s specifications. Closing the master link requires the method specified for that model and the right tools. It is a job for someone who can check the fitting of the entire final drive.
Mekainos S.r.l., Turin, develops a native app for Android and iOS designed for motorcycles of every make. It organises maintenance around the way you ride, with a service history, so at the workshop you know when you last lubricated and adjusted the chain.
frequently asked questions about motorcycle chains
Does a sealed chain need lubricating?
Yes, following the manufacturer’s instructions. The seals keep the internal lubricant in place, and external maintenance is still required.
How tight should the chain be?
The correct slack is the one given in your motorcycle’s manual. The position of the bike during the measurement must match the procedure specified.
Can I fix stiff links with more grease?
Persistent stiffness calls for a wear assessment. Lubrication is part of maintenance, but a damaged part needs replacing.
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